Koen:
[...]
>A cache can never know whether a
>document has been more recently modified than the last time it fetched it.
>So it has to check every time.
I don't want it to check every time: the spec does not (and should
not) require it to do so. If I put
Sorry, I think this is another misunderstanding.
The context of my remark is the use of GET-IMS. If a cache gets a
GET-IMS with an IMS date > the date of its own last request for a
particular document it holds, it must forward the request, since it
doesn't know if the document has been modified more recently than the
last time it asked.
--Shel